Conceptual Physics (12th Edition)

by
Hewitt, Paul G.

Published by
Addison-Wesley

ISBN 10:
0321909100

ISBN 13:
978-0-32190-910-7

Chapter 6 - Think and Solve - Page 105: 31

Answer

The impulse is the change in momentum.
Using an equation from page 93, solve for the average seat belt force.
Let's deal only with the magnitudes of these quantities.
$$Ft = \Delta(mv) = mv$$
$$F = \frac{(75 kg)(25 m/s)}{0.1 s} = 18,750 N$$